of chicago



May 17 r1927. 1,629,244-

F. H. WILLCOX DUST RECEIVER Filed May 16. 1921 Patented May 17, 1927..

UNITED STATES I 1,629,244 PATENT OFFICE.

FREDERICK I-I. WIIiLCOX, OF CHICAGO, ILLINOIS, ASSIGNOR T FREYN ENGINEERING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

DUST RECEIVER.

Application filed May 16, 1921. Serial No. 470,214.

This invention relates to a new andimproved dust receiver, or more specifically to an improved dust receiver particularly adapted for application to a dust catcher bottom and including means adapted to moisten or wet the dust discharged therefrom.

In gas making systems and particularly those handling blast furnace or producer gas, it is customary to place in the gas line adjacent the producing source a dust catcher for the purpose of removing the hue particles of material carried by the gas. Much of this matter is in a very finely divided form and in its removal in the periodic cleaning of the dust catcher it tends to be readily blown away by the air and thus becomes a considerable nuisance in the plant.

It is an object of the present invention to provide means adapted to select from the material discharged from the dust catcher the larger pieces of material and discharge them in one place, and to separately discharge the iinely divided matter.

It is a further object to provide means for thoroughly dampening the finely divided matter so that it has no tendency to be carried away by the air.

It is a further object to provide means for uniformly and continuously discharging the moistened material when desired.

Other and further objects will appear as the description proceeds.

Broadly, my invention comprises a closed chamber associated with the discharge opening of the gas cleaner or dust catcher. In

this chamber is provided a plate located below the discharge opening and a grizzly associated with the plate in prolongation thereof. A drag conveyor is provided to sweep the material along the plate and across the grizzly and to discharge the larger pieces off the end of the grizzly. A chute is provided below the grizzly discharging into a pug mill. ater connection is provided to the pug mill whereby material passing through is moistened and the moisture is uniformly distributed by the action of the mill. p

I have illustrated a preferred embodiment of my invention in the accompanying drawings. in which- Figure 1 is a sectional elevation showing my invention applied to the discharge end of a dust catcher; and

Figure 2 is a horizontal section taken on line 2-2 of Figure 1. i

The bottom 5 of the dust catcher is shown as in the shape of a hopper and is provided with a discharge opening 6. This opening 6 is normally closed by the laterally movable door 7, the door being carried by a handle 8 and pivoted at 9 to the upwardly extendingportion 10 of the chamber 11. The chamber 11 is provided with the transversely extending plate 12 located at. the end under the discharge opening from the dust catcher. Extending in continuation of this plate 12 is the grizzly 13. The drag conveyor 14 carried upon shafts 15 and 16 at the opposite ends of the chamber serves to carry material over the plate 12 and grizzly 13. The shafts 15 and 16 as shown are placed externally of the chamber 11. The heavy flexible screening member 17 is associated with the incoming opening for the conveyor and the outgoing opening is closed by a similar member 18. A chute 19 is provided at the outgoing end. The lower portion 20 of the chamber 11 located under the grizzly 13 is in the form of a hopper sloping toward the discharge opening 21. Located below the openin 21 is the pug mill 22. The shaft 23 may be supplied with power in any desired manner. The water connection 24 is provided with valve 25 and is led into the inner end of the pug mill.

In the operation of my device, when it is desired to remove the accumulated material from the dust catcher, the door .7 is moved laterally by means of the handle 8 about the pivot 9 until it is out of registration with the opening 6. The conveyor 14 and the pug mill. 23 are placed in operation. Ma-

terial falling from the opening (5 upon the 1 plate 12 is carried on this plate by means of the cross elements of the conveyor 14 and is further swept across the grizzly 13. These particles too large to drop between the bars of the grizzly are carried over the end of the grizzly by the conveyor and fall down upon the chute 19. The fine material dropping through the grizzly is led by the hopper 20 to the discharge opening 21 where it falls into the pug mill. The rotation of the shaft 23 of this mill serves to carry the material out the discharge end of the mill.

ater being supplied during the operation of the mill through the pipe 24, the fine material is moistened and due to the the clearance between the bars of the grizzly stirring and kneading operation of the mill plates the moisture is thoroughly and uni- .tornrly directed onto the material. A car or other receptacle is placed under the discharge end of the material and the moistened material isremoved for briquetting or other purposes as desired. In its moist state it has no tendency to be diffused in the atmosphere.

'It is to be understood that the apparatus is only put in operation periodically andfor short periods at. such times as it is desired to clean out" the dust catcher: Obviously the size and proportion of the elements may be varied to suit differing reqniren'ients and may be varied according}; to what division it is desired to make oetween large and small particles.

l claim 1. Dust treating apparatus comprising a substantially closed chamber adapted to be located below the discharge opening; of a dust catcher, a plate located in said chamber substantially closed chamber adapted to be located below the discharge opening of a dust catcher, a plate located in said chamber below said opening, a grizzly located; in prolongation oi" the plate, a drag. conveyor associated with the plate and grizzly and e3:- tending' out of the chamber and adapted to more material deposited on saidplate over said grizzly. and yielding means closing the chamber adjacent said conveyor and adapted to prevent passage of dust from the conveyor.

Signed at Chicago, Illinois, this 11th day off lllay, 1921. t

FREDERICK H. lVTLLCOX. 

